The big bang wasn’t a bang in the traditional sense—but it was nonetheless the start of important things: for one, space; another, time. Thirdly, it began the conditions and processes that eventually ...

They're big, they appear early in the history of the universe and where they come from has long been a mystery. Ever since astronomers first detected the existence of supermassive black holes at the ...

Is the universe infinite? It's one of the most profound questions we can ask, and here's the short answer: We don't know. While we have learned a great deal about the universe, a portion of the cosmos ...